refactor into seperate authority package

pkg/controller/certificates/authority/policies_test.go

@@ -0,0 +1,93 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package authority
+
+import (
+	"crypto/x509"
+	"fmt"
+	"reflect"
+	"testing"
+
+	capi "k8s.io/api/certificates/v1beta1"
+)
+
+func TestKeyUsagesFromStrings(t *testing.T) {
+	testcases := []struct {
+		usages              []capi.KeyUsage
+		expectedKeyUsage    x509.KeyUsage
+		expectedExtKeyUsage []x509.ExtKeyUsage
+		expectErr           bool
+	}{
+		{
+			usages:              []capi.KeyUsage{"signing"},
+			expectedKeyUsage:    x509.KeyUsageDigitalSignature,
+			expectedExtKeyUsage: nil,
+			expectErr:           false,
+		},
+		{
+			usages:              []capi.KeyUsage{"client auth"},
+			expectedKeyUsage:    0,
+			expectedExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
+			expectErr:           false,
+		},
+		{
+			usages:              []capi.KeyUsage{"client auth", "client auth"},
+			expectedKeyUsage:    0,
+			expectedExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth},
+			expectErr:           false,
+		},
+		{
+			usages:              []capi.KeyUsage{"cert sign", "encipher only"},
+			expectedKeyUsage:    x509.KeyUsageCertSign | x509.KeyUsageEncipherOnly,
+			expectedExtKeyUsage: nil,
+			expectErr:           false,
+		},
+		{
+			usages:              []capi.KeyUsage{"ocsp signing", "crl sign", "s/mime", "content commitment"},
+			expectedKeyUsage:    x509.KeyUsageCRLSign | x509.KeyUsageContentCommitment,
+			expectedExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageEmailProtection, x509.ExtKeyUsageOCSPSigning},
+			expectErr:           false,
+		},
+		{
+			usages:              []capi.KeyUsage{"unsupported string"},
+			expectedKeyUsage:    0,
+			expectedExtKeyUsage: nil,
+			expectErr:           true,
+		},
+	}
+
+	for _, tc := range testcases {
+		t.Run(fmt.Sprint(tc.usages), func(t *testing.T) {
+			ku, eku, err := keyUsagesFromStrings(tc.usages)
+
+			if tc.expectErr {
+				if err == nil {
+					t.Errorf("did not return an error, but expected one")
+				}
+				return
+			}
+
+			if err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+
+			if ku != tc.expectedKeyUsage || !reflect.DeepEqual(eku, tc.expectedExtKeyUsage) {
+				t.Errorf("got=(%v, %v), want=(%v, %v)", ku, eku, tc.expectedKeyUsage, tc.expectedExtKeyUsage)
+			}
+		})
+	}
+}